CN103900310A - Solution desiccant system and method for preventing air source heat pump water heater from frosting - Google Patents

Solution desiccant system and method for preventing air source heat pump water heater from frosting Download PDF

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CN103900310A
CN103900310A CN201410156239.8A CN201410156239A CN103900310A CN 103900310 A CN103900310 A CN 103900310A CN 201410156239 A CN201410156239 A CN 201410156239A CN 103900310 A CN103900310 A CN 103900310A
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air
valve
outlet
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solution
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CN103900310B (en
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李舒宏
李姗姗
杜垲
张小松
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Southeast University
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Southeast University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a solution desiccant system and method for preventing an air source heat pump water heater from frosting. The desiccant effect of a solution is utilized to restrain moisture in wet air from frosting on the surface of an evaporator. Dehumidification is performed on air at an inlet of the evaporator through the desiccant concentrated solution, so that frosting of the heat pump water heater is substantially relived, and the heating performance of the heat pump water heater is improved. Meanwhile, when the desiccant solution reaches a moisture absorption limit, regeneration is performed on the dilute solution by utilizing the heat of a heat pump loop itself, at this time, heat and moisture transfer is performed between circulating air and the heated high-temperature dilute solution, the air after heat absorption releases heat in the evaporator, the air is finally recycled by the system, and therefore the regeneration efficiency of the heat pump is enhanced. According to the solution desiccant system and method, by connecting the heat pump loop and an air circulation loop in parallel, not only is the problem that the wet air frosts easily on the surface of the evaporator solved, but also the water heating efficiency of the whole system is enhanced.

Description

The system and method for solution dehumidification prevention air source hot pump water heater frosting
Technical field
The present invention utilizes solution to carry out dehumidification treatments to the air in Teat pump boiler loop, improve the outdoor evaporimeter heat exchange property of Teat pump boiler, improve the heating performance of heat pump water heater system, belong to and improve air source hot pump water heater performance field, relate to household electrical appliances and manufacture field, especially, combine a kind of new method of pre-antifrost.
Background technology
At present, in the water heater that China resident uses, electric heater, gas heater and solar water heater occupy great ratio.And in air source hot pump water heater can need the transfer of heat of low-temperature heat source by consumption part electric energy domestic hot-water to us, because its energy-efficient advantage becomes the 4th class New-type water heater form.But it is subject to the impact of region temperature, the area of low, the high humidity of outside air temperature in the winter time, the situation in evaporator surface generation frosting very easily when it's the end is past the evaporating temperature of heat pump, thereby affect the heat transfer effect of evaporimeter, cause system heating capacity to reduce, the heating performance of heat pump reduces, and in serious situation, even can not start.For this problem, the method for multiple solution defrosting has been proposed both at home and abroad, comprise nature defrosting, hot gas defrosting, water defrosting and electric heated defrosting etc.What the air source hot pump water heater manufacturing enterprise of China commonly used is hot gas defrosting.This Defrost mode is divided into again two kinds of modes: hot gas bypass defrosting and reverse cycle defrosting.The former is that a part of gases at high pressure that compressor is discharged are directly bypassed to and in evaporimeter, carry out defrosting, now because the heat of high-pressure side refrigerant still comes from the heat that evaporimeter absorbs, when temperature is lower, defrosting is when fast not, there is no enough heat absorption, will cause system to be absorbed in protectiveness stopped status; The latter carries out reverse circulation defrosting by four-way change-over valve, now not only can not hot water preparing, and also can make original hot water energy scatter and disappear.More than can find out that more existing conventional Defrost modes have drawback separately.
The present invention is based on the problem proposing in above-mentioned background technology, designed a kind of new method that dehumidifies to prevent air source hot pump water heater frosting by binding soln.From above-mentioned background technology, can find out, current technology is all to defrost by different modes after the outdoor evaporimeter frosting of Teat pump boiler, the present invention considers from the thinking of pre-antifrost, the outdoor air that enters evaporimeter is carried out to pretreatment, its humidity is reduced, be suppressed at frosting in the heat transfer process of evaporimeter, strengthened outdoor evaporation and heat-exchange, improved the heating performance of system.Meanwhile, utilize the heat of heat pump circuit to regenerate to solution, ensured stability and the high efficiency of dehumidifying and regenerative process.
Summary of the invention
Technical problem: the present invention is directed to the deficiency of current Defrost mode to air source hot pump water heater defrosting effect, proposed the system and method for a kind of solution dehumidification prevention air source hot pump water heater frosting.
Summary of the invention: for solving the problems of the technologies described above, the system that the invention provides the frosting of a kind of solution dehumidification prevention air source hot pump water heater, this system comprises: compressor, plate type heat exchanger, the first electric expansion valve, solution tank, spray equipment, spray chamber, solution pump, the second electric expansion valve, outdoor finned tube exchanger, water tank, water circulating pump, the first air-valve, the second air-valve, the 3rd air-valve, blower fan, gas-liquid separator, block valve and pressure-reducing valve;
Solution tank bottom by pipeline connects one end of solution pump, the other end of solution pump is connected with spray equipment, spray chamber on solution tank top, and communicate with solution tank;
Heat pump and air circulation system when heat pump when this system comprises dehumidifying and air circulation system, regeneration;
Heat pump when described dehumidifying:
Compressor is provided with refrigerant inlet, the outlet of compressor is connected with the import of plate-type condenser, the first outlet of plate-type condenser is connected with the import of the first electric expansion valve, the outlet of electric expansion valve is connected with the first import of solution tank, the first outlet of solution tank is connected with the import of gas-liquid separator, the first outlet of gas-liquid separator is connected with the import of the second electric expansion valve, the first import of downstream chamber's external finned tube evaporimeter of the second electric expansion valve is connected, and the first outlet of outdoor finned-tube evaporator is connected with the import of compressor; The second outlet of gas-liquid separator is connected with the import of pressure-reducing valve, and the outlet of pressure-reducing valve is connected with the import of compressor; The outlet of water tank is connected with the import of water circulating pump, and recirculated water delivery side of pump is connected with the first import of plate-type condenser;
Air circulation system when described dehumidifying:
The first air-valve is provided with air intlet, the outlet of the first air-valve is connected with spray chamber, the outlet of spray equipment is connected with the second import of outdoor finned-tube evaporator, the second outlet of outdoor finned-tube evaporator is connected with the import of the 3rd air-valve, and the outlet of the 3rd air-valve is connected with the second import of solution tank;
Heat pump when described regeneration:
The outlet of compressor is connected with the import of plate-type condenser, the second outlet of plate-type condenser is connected with the import of block valve, the outlet of block valve is connected with the first import of solution tank, the first outlet of solution tank is connected with the import of gas-liquid separator, the first outlet of gas-liquid separator is connected with the import of the second electric expansion valve, the first import of downstream chamber's external finned tube evaporimeter of the second electric expansion valve is connected, and the first outlet of outdoor finned-tube evaporator is connected with the import of compressor; Wherein, the water inlet cast face of the outlet pipe of outdoor finned-tube evaporator and condensate pipe; The outlet of water tank is connected with the import of water circulating pump, and recirculated water delivery side of pump is connected with the first import of plate-type condenser;
Air circulation system when described regeneration:
The second outlet of outdoor finned-tube evaporator is connected with the import of the second air-valve, the outlet of the second air-valve is connected with spray chamber, the outlet of spray equipment is connected with the second import of outdoor finned-tube evaporator, the second outlet of outdoor finned-tube evaporator is connected with the import of the second air-valve, and the outlet of the second air-valve is connected with the second import of solution tank.
Enter spray chamber with from solution tank bottom through the high temperature weak solution of solution pump and spray equipment the wet exchange of heat occurs through the second air-valve from outdoor finned-tube evaporator Cryogenic air out, air after intensification humidification becomes Cryogenic air after entering finned-tube evaporator cool-down dehumidification, and then enter the formation circulation of spray chamber by the second air-valve, wherein, weak solution discharges after moisture thickens and flow in solution tank.
The present invention also provides the method for a kind of solution dehumidification prevention air source hot pump water heater frosting, and the method comprises the steps:
Heat pump when described dehumidifying:
Gaseous refrigerant enter compressor compresses increasing temperature and pressure laggard enter plate-type condenser emit heat and be condensed into highly pressurised liquid, after entering afterwards the first electric expansion valve decrease temperature and pressure, enter solution tank absorption heat and evaporate a part of working medium, enter gas-liquid separator and carry out gas-liquid separation, the liquid of separating absorbs heat and evaporates the gas that becomes low-temp low-pressure after entering the second electric expansion valve throttling decrease temperature and pressure again in outdoor finned-tube evaporator, and the gas of separating and pass through afterwards pressure-reducing valve with gas-liquid separator is mixed into compressor and forms a loop.Meanwhile, the water in water tank is from one end by absorbing heat water circulating pump suction plate-type condenser, and the water after heating enters water tank from the other end and stores;
Air circulation system when described dehumidifying:
Outdoor humid air is entered in spray chamber and is absorbed moisture from solution tank bottom through the low temperature concentrated solution of solution pump and spray equipment by the first air-valve, air after dehumidifying enters outdoor finned-tube evaporator release heat heating and cooling working medium, the air that finally becomes low temperature and high relative humidity is turned back in atmosphere and is gone by the 3rd air-valve, wherein, concentrated solution absorbs moisture and flow in solution tank after thinning;
The heat pump in described when regeneration comprises: gaseous refrigerant enter compressor compresses increasing temperature and pressure laggard enter plate-type condenser emit fraction heat and be cooled, enter release heat in solution tank by the gas piping of block valve control afterwards and be condensed into highly pressurised liquid, enter heat absorption in the laggard external finned tube evaporimeter of entering the room of the second electric expansion valve throttling decrease temperature and pressure by gas-liquid separator and evaporate the gas that becomes low-temp low-pressure, enter compressor and form a loop; The moisture wherein condensing in outdoor finned-tube evaporator can be discharged system by condensate pipe; Meanwhile, the water in water tank passes through by natural flow from water tank one end that water circulating pump is laggard to be entered to absorb heat plate-type condenser, and the water after heating enters water tank from the other end and stores;
Air circulation system when described regeneration comprises: enter spray chamber with from solution tank bottom through the high temperature weak solution of solution pump and spray equipment the wet exchange of heat occurs through the second air-valve from outdoor finned-tube evaporator Cryogenic air out, air after intensification humidification becomes Cryogenic air after entering finned-tube evaporator cool-down dehumidification, and then enter the formation circulation of spray chamber by the second air-valve, wherein, weak solution discharges after moisture thickens and flow in solution tank.
Beneficial effect:
1. this system utilizes the wet-out property of solution to carry out pretreatment to the humid air that enters evaporimeter, has reduced the humidity of air, has suppressed the frosting problem of humid air at evaporator surface, has prevented the problems such as the heating performance reduction that frosting problem is brought; Meanwhile, through the cold-producing medium of spray chamber and solution tank can absorption dehumidifying process in the solution absorption heat of emitting, this part heat can be converted into condensation heat by system recoveries and for heat hot water;
2. this system utilizes heat pump fluid condensation liberated heat to carry out thermal regeneration to weak solution, has not only ensured the stability of regenerative process, and has recovered again the wet-out property of solution; Meanwhile, there is the wet exchange of heat in the high temperature weak solution after being heated in regenerative process and circulated air, and the air after heat absorption discharges heat in evaporimeter, finally utilized by system recoveries, thus the regeneration efficiency of raising heat pump.
Brief description of the drawings
Fig. 1 is system architecture schematic diagram of the present invention.
Fig. 2 is heat pump circuit system schematic of the present invention.
Fig. 3 is dehumidification process air circulation schematic diagram of the present invention.
Fig. 4 is regenerative process air circulation schematic diagram of the present invention.
Compressor 1, plate type heat exchanger 2, the first electric expansion valve 3, solution tank 4, spray equipment 14, spray chamber 15, solution pump 13, the second electric expansion valve 5, outdoor finned tube exchanger 6, water tank 7, water circulating pump 8, the first air-valve 9, the second air-valve 10, the 3rd air-valve 11, blower fan 12, gas-liquid separator 16, block valve 17 and pressure-reducing valve 18
Detailed description of the invention
Below in conjunction with drawings and the embodiments, patent of the present invention is described in further detail:
As Figure 1-4, the system of solution dehumidification prevention air source hot pump water heater provided by the invention frosting, this system comprises: compressor 1, plate type heat exchanger 2, the first electric expansion valve 3, solution tank 4, spray equipment 14, spray chamber 15, solution pump 13, the second electric expansion valve 5, outdoor finned tube exchanger 6, water tank 7, water circulating pump 8, the first air-valve 9, the second air-valve 10, the 3rd air-valve 11, blower fan 12, gas-liquid separator 16, block valve 17 and pressure-reducing valve 18.
Solution tank 4 bottoms by pipeline connect one end of solution pump 13, the other end of solution pump 13 is connected with spray equipment 14, spray chamber 15, on solution tank 4 tops, and communicates with solution tank 4.
Heat pump and air circulation system when heat pump when this system comprises dehumidifying and air circulation system, regeneration.
Heat pump when described dehumidifying:
Compressor 1 is provided with refrigerant inlet, the outlet of compressor 1 is connected with the import of plate-type condenser 2, the first outlet of plate-type condenser 2 is connected with the import of the first electric expansion valve 3, the outlet of electric expansion valve 3 is connected with the first import of solution tank 4, the first outlet of solution tank 4 is connected with the import of gas-liquid separator 16, the first outlet of gas-liquid separator 16 is connected with the import of the second electric expansion valve 5, the first import of downstream chamber's external finned tube evaporimeter 6 of the second electric expansion valve 5 is connected, and the first outlet of outdoor finned-tube evaporator 6 is connected with the import of compressor 1; The second outlet of gas-liquid separator 16 is connected with the import of pressure-reducing valve 18, and the outlet of pressure-reducing valve 18 is connected with the import of compressor 1; The outlet of water tank 7 is connected with the import of water circulating pump 8, and the outlet of water circulating pump 8 is connected with the first import of plate-type condenser 2.
Air circulation system when described dehumidifying:
The first air-valve 9 is provided with air intlet, the outlet of the first air-valve 9 is connected with spray chamber 15, the outlet of spray equipment 14 is connected with the second import of outdoor finned-tube evaporator 6, the second outlet of outdoor finned-tube evaporator 6 is connected with the import of the 3rd air-valve 11, and the outlet of the 3rd air-valve 11 is connected with the second import of solution tank 4.
Heat pump when described regeneration:
The outlet of compressor 1 is connected with the import of plate-type condenser 2, the second outlet of plate-type condenser 2 is connected with the import of block valve 17, the outlet of block valve 17 is connected with the first import of solution tank 4, the first outlet of solution tank 4 is connected with the import of gas-liquid separator 16, the first outlet of gas-liquid separator 16 is connected with the import of the second electric expansion valve 5, the first import of downstream chamber's external finned tube evaporimeter 6 of the second electric expansion valve 5 is connected, and the first outlet of outdoor finned-tube evaporator 6 is connected with the import of compressor 1; Wherein, the water inlet cast face of the outlet pipe of outdoor finned-tube evaporator 6 and condensate pipe; The outlet of water tank 7 is connected with the import of water circulating pump 8, and the outlet of water circulating pump 8 is connected with the first import of plate-type condenser 2.
Air circulation system when described regeneration:
The second outlet of outdoor finned-tube evaporator 6 is connected with the import of the second air-valve 10, the outlet of the second air-valve 10 is connected with spray chamber 15, the outlet of spray equipment 14 is connected with the second import of outdoor finned-tube evaporator 6, the second outlet of outdoor finned-tube evaporator 6 is connected with the import of the second air-valve 10, and the outlet of the second air-valve 10 is connected with the second import of solution tank 4.
Enter spray chamber 15 with from solution tank 4 bottoms through the high temperature weak solution of solution pump 13 and spray equipment 14 the wet exchange of heat occurs through the second air-valve 10 from outdoor finned-tube evaporator 6 Cryogenic air out, air after intensification humidification becomes Cryogenic air after entering finned-tube evaporator 6 cool-down dehumidifications, and then enter the 15 formation circulations of spray chamber by the second air-valve 10, wherein, weak solution discharges after moisture thickens and flow in solution tank 4.
The present invention also provides the method for a kind of solution dehumidification prevention air source hot pump water heater frosting, and the method comprises the steps:
Heat pump when described dehumidifying:
Gaseous refrigerant enter compressor 1 compress increasing temperature and pressure laggard enter plate-type condenser 2 emit heat and be condensed into highly pressurised liquid, enter afterwards and enter solution tank 4 after the first electric expansion valve 3 decrease temperature and pressure and absorb heat and evaporate a part of working medium, enter gas-liquid separator 16 and carry out gas-liquid separation, the liquid of separating enters after the second electric expansion valve 5 throttlings decrease temperature and pressure again in outdoor finned-tube evaporator 6 heat absorption evaporation becomes the gas of low-temp low-pressure, the gas of separating and pass through pressure-reducing valve 18 with gas-liquid separator 16 is afterwards mixed into compressor 1 and forms a loop.Meanwhile, the water in water tank 7 is from one end by absorbing heat water circulating pump 8 suction plate-type condensers 2, and the water after heating enters water tank from the other end and stores.
Air circulation system when described dehumidifying:
Outdoor humid air is entered in spray chamber 15 and is absorbed moisture from solution tank 4 bottoms through the low temperature concentrated solution of solution pump 13 and spray equipment 14 by the first air-valve 9, air after dehumidifying enters outdoor finned-tube evaporator 6 release heat heating and cooling working medium, the air that finally becomes low temperature and high relative humidity is turned back in atmosphere and is gone by the 3rd air-valve 11, wherein, concentrated solution absorbs moisture and flow in solution tank 4 after thinning.
The heat pump in described when regeneration comprises: gaseous refrigerant enter compressor 1 compress increasing temperature and pressure laggard enter plate-type condenser 2 emit fraction heat and be cooled, the gas piping of controlling by block valve 17 afterwards enters release heat in solution tank 4 and is condensed into highly pressurised liquid, enter heat absorption in the laggard external finned tube evaporimeter 6 of entering the room of the second electric expansion valve 5 throttling decrease temperature and pressure by gas-liquid separator 16 and evaporate the gas that becomes low-temp low-pressure, enter compressor 1 and form a loop; The moisture wherein condensing in outdoor finned-tube evaporator 6 can be discharged system by condensate pipe; Meanwhile, the water in water tank 7 passes through by natural flow from water tank one end that water circulating pump 8 is laggard to be entered to absorb heat plate-type condenser 2, and the water after heating enters water tank from the other end and stores;
Air circulation system when described regeneration comprises: enter spray chamber 15 with from solution tank 4 bottoms through the high temperature weak solution of solution pump 13 and spray equipment 14 the wet exchange of heat occurs through the second air-valve 10 from outdoor finned-tube evaporator 6 Cryogenic air out, air after intensification humidification becomes Cryogenic air after entering finned-tube evaporator 6 cool-down dehumidifications, and then enter the 15 formation circulations of spray chamber by the second air-valve 10, wherein, weak solution discharges after moisture thickens and flow in solution tank 4.
The specific embodiments of system of the present invention is as follows:
When dehumidifying operation, open air-valve 9 and air-valve 11, open water pump 8, solution pump 13, close air-valve 10, close block valve 17, unlocking electronic expansion valve 3.When heat pump water heating, gaseous refrigerant through compressor 1 increasing temperature and pressure laggard enter condensation heat release in plate type heat exchanger 2, produce hot water, in solution tank 4, absorb heat and evaporate a part of cold-producing medium by entering after the first electric expansion valve 3 step-downs, the refrigerant liquid of separating by gas-liquid separator 13 afterwards enters after the second electric expansion valve 5 throttlings evaporation endothermic in the further laggard external finned tube formula evaporimeter 6 of entering the room of decrease temperature and pressure becomes the gaseous refrigerant of low-temp low-pressure, the gas of separating and pass through pressure-reducing valve 18 with gas-liquid separator 13 is afterwards mixed in compressor 1 and completes heat pump cycle.Wherein, water pump 8 pumps into the water in water tank 7 in plate-type condenser 2 and absorbs heat, and the water after heating enters and stores from the other end of water tank 7; In air circulation, outdoor air enters spray chamber 15, absorbed moisture from solution tank 4 bottoms through the low temperature concentrated solution of solution pump 13 and spray equipment 14 therein, air mass dryness fraction is improved, air after mass dryness fraction promotes enters release heat in outdoor finned-tube evaporator 6 becomes the air of low temperature and high relative humidity, gets back to outdoor afterwards by air-valve 11.
When regeneration operation, open air-valve 10, close air-valve 9 and air-valve 11, open solution pump 13, switch off the pump 8, close electric expansion valve 3, open block valve 17.Gaseous refrigerant through compressor 1 increasing temperature and pressure laggard enter condensation emit sub-fraction heat and produce hot water in plate type heat exchanger 2, enter and in solution tank 4, continue release heat and be condensed into highly pressurised liquid by block valve 14 afterwards, enter evaporation endothermic in the laggard external finned tube formula evaporimeter 6 of entering the room of the second electric expansion valve 5 throttling decrease temperature and pressure through gas-liquid separator 13 afterwards, the refrigerant gas of last low-temp low-pressure enters in compressor again, completes heat pump cycle.Wherein, in water tank 7, entered in plate-type condenser 2 and absorbed heat by natural flow, the water after heating enters and stores from the other end of water tank 7; In air circulation, enter spray chamber 15 with from solution tank 4 bottoms through the high temperature weak solution of solution pump 13 and spray equipment 14 the wet exchange of heat occurs by air-valve 10 from outdoor finned-tube evaporator Cryogenic air out, air after warming and humidifying is cooled and dehumidifies in outdoor finned-tube evaporator 6, and the moisture wherein condensing in evaporimeter 6 can be discharged system by condensate pipe.
In system of the present invention, utilize the exsiccation of solution to suppress in humid air moisture in the frosting of evaporator surface.The present invention utilizes dehumidifying concentrated solution to carry out dehumidification treatments to evaporator air, thereby significantly alleviates the frosting problem of Teat pump boiler, improves the heating performance of Teat pump boiler; Simultaneously, when dehumidification solution reaches after moisture absorption limit, utilize the heat of heat pump circuit self to regenerate to weak solution, now the high temperature weak solution after circulated air and heating is carried out the wet exchange of heat, air after heat absorption discharges heat in evaporimeter, finally utilized by system recoveries, thus the regeneration efficiency of raising heat pump.The present invention, by heat pump circuit in parallel and air circulation loop, has not only solved the problem of humid air in the easy frosting of evaporator surface, and has improved the efficiency of whole system water heating.

Claims (2)

1. the system of solution dehumidification prevention air source hot pump water heater frosting, it is characterized in that: this system comprises: compressor (1), plate type heat exchanger (2), the first electric expansion valve (3), solution tank (4), spray equipment (14), spray chamber (15), solution pump (13), the second electric expansion valve (5), outdoor finned tube exchanger (6), water tank (7), water circulating pump (8), the first air-valve (9), the second air-valve (10), the 3rd air-valve (11), blower fan (12), gas-liquid separator (16), block valve (17) and pressure-reducing valve (18),
Solution tank (4) bottom by pipeline connects one end of solution pump (13), the other end of solution pump (13) is connected with spray equipment (14), spray chamber (15) on solution tank (4) top, and communicate with solution tank (4);
Heat pump and air circulation system when heat pump when this system comprises dehumidifying and air circulation system, regeneration;
Heat pump when described dehumidifying:
Compressor (1) is provided with refrigerant inlet, the outlet of compressor (1) is connected with the import of plate-type condenser (2), the first outlet of plate-type condenser (2) is connected with the import of the first electric expansion valve (3), the outlet of electric expansion valve (3) is connected with the first import of solution tank (4), the first outlet of solution tank (4) is connected with the import of gas-liquid separator (16), the first outlet of gas-liquid separator (16) is connected with the import of the second electric expansion valve (5), the first import of downstream chamber's external finned tube evaporimeter (6) of the second electric expansion valve (5) is connected, the first outlet of outdoor finned-tube evaporator (6) is connected with the import of compressor (1), the second outlet of gas-liquid separator (16) is connected with the import of pressure-reducing valve (18), and the outlet of pressure-reducing valve (18) is connected with the import of compressor (1), the outlet of water tank (7) is connected with the import of water circulating pump (8), and the outlet of water circulating pump (8) is connected with the first import of plate-type condenser (2),
Air circulation system when described dehumidifying:
The first air-valve (9) is provided with air intlet, the outlet of the first air-valve (9) is connected with spray chamber (15), the outlet of spray equipment (14) is connected with the second import of outdoor finned-tube evaporator (6), the second outlet of outdoor finned-tube evaporator (6) is connected with the import of the 3rd air-valve (11), and the outlet of the 3rd air-valve (11) is connected with the second import of solution tank (4);
Heat pump when described regeneration:
The outlet of compressor (1) is connected with the import of plate-type condenser (2), the second outlet of plate-type condenser (2) is connected with the import of block valve (17), the outlet of block valve (17) is connected with the first import of solution tank (4), the first outlet of solution tank (4) is connected with the import of gas-liquid separator (16), the first outlet of gas-liquid separator (16) is connected with the import of the second electric expansion valve (5), the first import of downstream chamber's external finned tube evaporimeter (6) of the second electric expansion valve (5) is connected, the first outlet of outdoor finned-tube evaporator (6) is connected with the import of compressor (1), wherein, the water inlet cast face of the outlet pipe of outdoor finned-tube evaporator (6) and condensate pipe, the outlet of water tank (7) is connected with the import of water circulating pump (8), and the outlet of water circulating pump (8) is connected with the first import of plate-type condenser (2),
Air circulation system when described regeneration:
The second outlet of outdoor finned-tube evaporator (6) is connected with the import of the second air-valve (10), the outlet of the second air-valve (10) is connected with spray chamber (15), the outlet of spray equipment (14) is connected with the second import of outdoor finned-tube evaporator (6), the second outlet of outdoor finned-tube evaporator (6) is connected with the import of the second air-valve (10), and the outlet of the second air-valve (10) is connected with the second import of solution tank (4);
Enter spray chamber (15) with from solution tank (4) bottom through the high temperature weak solution of solution pump (13) and spray equipment (14) the wet exchange of heat occurs through the second air-valve (10) from outdoor finned-tube evaporator (6) Cryogenic air out, air after intensification humidification becomes Cryogenic air after entering finned-tube evaporator (6) cool-down dehumidification, and then enter spray chamber (15) formation circulation by the second air-valve (10), wherein, weak solution discharges after moisture thickens and flow in solution tank (4).
2. a method for solution dehumidification prevention air source hot pump water heater frosting, is characterized in that: the method comprises the steps:
Heat pump when described dehumidifying:
Gaseous refrigerant enter compressor (1) compression increasing temperature and pressure laggard enter plate-type condenser (2) emit heat and be condensed into highly pressurised liquid, after entering afterwards the first electric expansion valve (3) decrease temperature and pressure, enter solution tank (4) absorption heat and evaporate a part of working medium, enter gas-liquid separator (16) and carry out gas-liquid separation, the liquid of separating enters after the second electric expansion valve (5) throttling decrease temperature and pressure again in outdoor finned-tube evaporator (6) heat absorption evaporation becomes the gas of low-temp low-pressure, afterwards and gas-liquid separator (16) gas of separating and pass through pressure-reducing valve (18) be mixed into compressor (1) and form a loop.Meanwhile, the water in water tank (7) is from one end by absorbing heat water circulating pump (8) suction plate-type condenser (2), and the water after heating enters water tank from the other end and stores;
Air circulation system when described dehumidifying:
Outdoor humid air is entered in spray chamber (15) and is absorbed moisture from solution tank (4) bottom through the low temperature concentrated solution of solution pump (13) and spray equipment (14) by the first air-valve (9), air after dehumidifying enters outdoor finned-tube evaporator (6) release heat heating and cooling working medium, the air that finally becomes low temperature and high relative humidity is turned back in atmosphere and is gone by the 3rd air-valve (11), wherein, concentrated solution absorbs moisture and flow in solution tank (4) after thinning;
The heat pump in described when regeneration comprises: gaseous refrigerant enter compressor (1) compression increasing temperature and pressure laggard enter plate-type condenser (2) emit fraction heat and be cooled, the gas piping of controlling by block valve (17) afterwards enters release heat in solution tank (4) and is condensed into highly pressurised liquid, enter heat absorption in the laggard external finned tube evaporimeter (6) of entering the room of the second electric expansion valve (5) throttling decrease temperature and pressure by gas-liquid separator (16) and evaporate the gas that becomes low-temp low-pressure, enter compressor (1) and form a loop; The moisture wherein condensing in outdoor finned-tube evaporator (6) can be discharged system by condensate pipe; Meanwhile, the water in water tank (7) passes through by natural flow from water tank one end that water circulating pump (8) is laggard to be entered to absorb heat plate-type condenser (2), and the water after heating enters water tank from the other end and stores;
Air circulation system when described regeneration comprises: enter spray chamber (15) with from solution tank (4) bottom through the high temperature weak solution of solution pump (13) and spray equipment (14) the wet exchange of heat occurs through the second air-valve (10) from outdoor finned-tube evaporator (6) Cryogenic air out, air after intensification humidification becomes Cryogenic air after entering finned-tube evaporator (6) cool-down dehumidification, and then enter spray chamber (15) formation circulation by the second air-valve (10), wherein, weak solution discharges after moisture thickens and flow in solution tank (4).
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CN111412674A (en) * 2020-04-01 2020-07-14 南京东达智慧环境能源研究院有限公司 Total-heat frostless air source heat pump system based on two-stage centrifugal compressor

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